How to take multiple outputs of a command and use them one by one later

This is what I am trying to achieve while using Sage worksheet interface.

Assume that I wrote a code and it gave, for example, for each i in a range of lists, list[0]. (First element of each list) So I have multiple outputs. Now I want to use these outputs, I want the system to consider them as a list, and take iterative combinations of elements of it. Can I do that, and how?